NAME

       Net::SIP::Simple::RTP - simple RTP handling for Net::SIP::Simple

SYNOPSIS

         my $echo_10 = Net::SIP::Simple->rtp( 'media_recv_echo', 'output.pcmu-8000', 10 );
         my $announce = Net::SIP::Simple->rtp( 'media_send_recv', 'announce.pcmu-8000', 2 );

DESCRIPTION

       This package handles simple RTP stuff for testing and small applications.  It provides
       methods for receiving PCUM/8000 data and for echoing them back or for sending and
       receiving PCMU/8000 data.

       It's used from method rtp in Net::SIP::Simple.

SUBROUTINES

       media_recv_echo ( [ OUTPUT, DELAY ] )
           Receives RTP data and echos them back to the sender.  If OUTPUT is given it will be
           used as the file for saving the received data without the RTP header.

           OUTPUT might also be a callback which gets the payload as argument.

           If DELAY is >0 the data will not be echoed back immediatly but with an delay of DELAY
           packets (e.g.  with DELAY 10 it will send back the first packet after it received the
           10th packet).  If DELAY is <0 the data will not be echoed back.  If DELAY is not given
           or equal 0 the data will be echoed back immediatly.

           If no traffic comes in for more then 10 seconds it will hang up the call because of
           inactivity.

       media_send_recv ( INPUT, [ REPEAT, OUTPUT ] )
           Will read data from file INPUT and send them as RTP to peer.  It will assume that each
           data block in INPUT consists of 160 bytes, which is right for PCMU/8000 without RTP
           header. The RTP header will be added to the data.

           If it reaches the end of the file it will stop unless REPEAT is given in which case it
           will repeat the sending REPEAT times (if REPEAT is less 0 it will repeat forever e.g.
           until the other party hangs up). On stopping it will invoke the callback cb_rtp_done
           from the connection params for the Net::SIP::Simple::Call or if this is not given it
           will close the call by issuing a BYE.

           INPUT might also be a callback usable by invoke_callback in Net::SIP::Util which
           returns the data to send. In this case REPEAT is not used.

           Incoming data will be written to the optional OUTPUT file like in media_recv_echo. The
           content from OUTPUT has the same format as INPUT or OUTPUT from media_recv_echo.

           OUTPUT might also be a callback which gets the payload as argument.

           If no traffic comes in for more then 10 seconds it will hang up the call because of
           inactivity.